When it comes to commercial kitchens, you do not want to have any issues with your dishwashers. A dishwasher plays a huge role in the operations of a busy commercial kitchen. It breaking down would cause you more problems than you can manage. You will have to get it fixed immediately. It is possible they can fix it in time, or they may suggest you get another one. You only think of getting another one when you have to, since you cannot know for sure if it shall survive any longer. You therefore need to understand how to spot a machine that has long lasting parts in it.
You should first and foremost shun any that comes with plastic components in it. You shall find plenty of dishwashers out there that incorporate plastic components in their interiors that cannot withstand the pressures of your operation. They for one cannot take in too much heat, while the dishwasher is supposed to operate at high temperatures. Those are machines that do well at home, not the restaurant.
The choice material for the parts is stainless steel. With such a machine, you can be sure its parts will not break down as a result of all that heat. This also takes a longer time for the limescale to build up in it. In case it manages to, cleaning it off with chemicals will be an easy process.
You also need to see where the machine was made. It needs to have been built by the best manufacturers there are. Their access to high-quality stainless steel needs to be assured. This will have you assured of high-quality parts and assembly, as well as a reasonable price. This is easy to tell, when you look at the well-known brands in the market that were made out of stainless steel. There are however lesser known names in the market, but which still make high quality machines and components. You only need to do your research well into those.
The warranties that accompany the machines and the parts are something you also need to watch out for. The longer the warranty period, the more comfortable you shall be with that purchase. You, therefore, need to aim for those that offer long periods of warranties. You also need to have an easy time reaching them whenever you have an issue. If getting in touch with them is already trouble, you cannot be sure they shall attend to an emergency as soon as you would want them to. If an emergency arises, your business will be left to suffer.